Thread cut-off mechanism for a sewing machine

Details Thread cut-off mechanism for a sewing machine Thread cut-off mechanism for a sewing machine

1994-05-02

1996-06-04

Nerbun, Peter

Sewing

Elements

Thread cutting, severing or breaking

112295, 112 8059, D05B 6502

Patent

active

055223311

ABSTRACT:
A sewing machine carries a sewing needle which in turn carries a thread through a stitching aperture of a throat plate beneath which is located a gripper carried by a gripper shaft. The gripper is defined by a gripper neck, a gripper hook and a gripper knee joining the gripper hook and the gripper neck. Located adjacent the gripper bend is a thread-cutting blade. A cam, link and linkage system is provided for selectively driving the gripper shaft to selectively (a) move the gripper (7) a predetermined distance through which the cutting blade is inoperative and (b) move the gripper a further distance beyond the predetermined distance through which the cutting blade is operative to cut-off the thread. A stop boss is also provided adjacent the gripper bend to prevent the thread from being cut during motion of the gripper the predetermined distance.

REFERENCES:
patent: 525043 (1894-08-01), Borton
patent: 3173392 (1965-03-01), Hedegaard
patent: 4155318 (1979-05-01), Yamamoto

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